US3517005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 2- and 4-substituted quinazolines
Assignee: Pfizer Inc
•
Filing: 1967-10-26
•
Granted: 1970-06-23
•
Expires: 1987-10-26
Abstract
No abstract record available.
Inventors
- 👤 Timothy H Cronin
- 👤 Hans-Jurgen E Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:31
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/94; C07D403/00; C07D403/02; C07D403/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2461950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |